[PATCH v3 07/16] of/device: add helper to get cpu device node from logical cpu index

From: Sudeep KarkadaNagesha
Date: Mon Jul 22 2013 - 07:35:57 EST


From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@xxxxxxx>

Multiple drivers need to get the cpu device node from the cpu logical
index and then access the of_node.

This patch adds helper function to fetch the device node directly.

Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@xxxxxxx>
---
include/linux/of_device.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index 9d27475..82ce324 100644
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -1,6 +1,7 @@
#ifndef _LINUX_OF_DEVICE_H
#define _LINUX_OF_DEVICE_H

+#include <linux/cpu.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h> /* temporary until merge */

@@ -43,6 +44,15 @@ static inline void of_device_node_put(struct device *dev)
of_node_put(dev->of_node);
}

+static inline struct device_node *of_cpu_device_node_get(int cpu)
+{
+ struct device *cpu_dev;
+ cpu_dev = get_cpu_device(cpu);
+ if (!cpu_dev)
+ return NULL;
+ return of_node_get(cpu_dev->of_node);
+}
+
#else /* CONFIG_OF */

static inline int of_driver_match_device(struct device *dev,
@@ -67,6 +77,11 @@ static inline const struct of_device_id *of_match_device(
{
return NULL;
}
+
+static inline struct device_node *of_cpu_device_node_get(int cpu)
+{
+ return NULL;
+}
#endif /* CONFIG_OF */

#endif /* _LINUX_OF_DEVICE_H */
--
1.8.1.2


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